
So...
those guys are monarches and they want to bring chaos to the world. More exactly they re preparing the earth for their war with the angels. The gates are the angels' way to help humanity and to make sure that at least some humans survive.
*Why is he helping them?* They were talking about the Shadow monarch, who "immerged" himself with Jinwoo (they think that Jinwoo lost his humanity to the shadow monarch). You'll later find out smth reeeeaaallyy tasty about his story.
And the *He's already here* they meant a person borrowing the power of the angels (guess who u ll be shocked hehehe)
I don't want to spoil too much... but i garantee you it'll get crispier and you'll curse more haha
FINALLY We re at that point in the light noveeeeeeeel ε=ε=(ノ≧∇≦)ノ !!!! Holy shit i can't wait fir the next chapteeeeeerrrs !!!!
LN readers... you should know what i mean haha !!